<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Document</title>
  <script src="https://cdn.jsdelivr.net/npm/vue@2.6.14/dist/vue.js"></script>
</head>

<body>
  <div id="app">
    <!-- 
      v-if 和 v-show 区别?
        v-if 是真正的条件渲染  只有符合条件的才会转为真实DOM 渲染到页面上
        v-show 是将全部的渲染 不满足条件的display: none

        用户频繁的切换用v-show  不频繁用v-if
    -->
    <h1>展示</h1>
    <button @click="type=1">新闻</button>
    <button @click="type=2">音乐</button>
    <button @click="type=3">首页</button>
    <p v-show="type===1">新闻.....</p>
    <p v-show="type===2">音乐.....</p>
    <p v-show="type===3">首页.....</p>


  </div>
  <script>
    Vue.config.productionTip = false;

    const vm = new Vue({
      el: "#app",
      data () {
        return {
          type: 1
        };
      },
    });
  </script>
</body>

</html>